Grinding & Classification Circuits

Grinding & Classification Circuits

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Rubber Ball Mill Liner Wear Rate Estimation (5 replies and 3 comments)

Oberfuhrer
8 years ago
Oberfuhrer 8 years ago

What formulation should I use for the estimated calculation of rubber type mill liners wear rate?

Amar
8 years ago
Amar 8 years ago

Rubber lining since a newer technology and population is still limited it is a proprietary item and design calculation shall be available with the manufacturer only. However some text book reference is available with METSO mill lining solution web page.

Jean Rasczak
8 years ago
Jean Rasczak 8 years ago

The wear rate on rubber mill liners (in fact most if not all types of liners) is a function of ore type and PSD, media type and size distribution, mill filling level, speed and operational up-time. I am not aware of a universal formulation to calculate expected wear life. Typically in wet mineral ball mills we see a life time of 2 years (under continuous operation)

Paul Morrow
8 years ago
Paul Morrow 8 years ago

The best advice I can give is to first consult the vendor/manufactory then measure wear each time the mill is shut down for maintenance. From this calculate the expected time to end of life. Further it is advisable to allocate funds and notify vendor at least when expected life is twenty five percent of total or six months, whichever comes first. This will avoid delays of production and much frustration. Also makes the accountants happy which is not a bad thing.

Sandeep Bisht
8 years ago
Sandeep Bisht 8 years ago

With thousands of wet grinding mills running with Rubber Lining and data available with us on mills lined by us; an approximation on expected life can be drawn. Key comparison points being Mill diameter, Media size, Mill speed and Tonnage handled.

The abrasion index of Rubber may vary with changes in these parameters.
Secondary Grinding Ball Mills experience 1-2 years of liner life, depending on tonnage/ball size. Normally Lifter to Plate ratio is 1:2.Tertiary Grinding Ball Mills experience up to 4 years of liner life.

Since, all the mills are unique in their operation and the practical sense in which they run, we do wear measurement during every shutdown. From the readings, a Wear profile is plotted and a series of these inspections give us very close liner life estimation. This also helps in re-designing the lining for higher life by addressing the weak zones. It is like a medical history of the liners. 

C
CesarFrancis
7 years ago

Hi dear colleagues! I'm a process enginer in the Peruvian cooper industry. I wold like you to help me with the advertisment of a reliable wear model for Cr-Mo Steel ball mill liners. Since there is not enough data ( only 3 or four ultrasonic measurements in 4 months of life and near of 6 million tons of ore processed). I hope you can help mi with this question.

David
7 years ago

advertisment?

C
CesarFrancis
7 years ago

I'm sorry, I wanted to say advice of a model.

David
7 years ago
David 7 years ago

what do you mean by models? for manufacturer contact glarose@bradken.com + he can guide you on design/shapes.

for general steel ball mill designs and profiles see https://www.911metallurgist.com/blog/ball-mill-liner-design

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